Implement wall count
Implement wall count

Just get it from the setting and put it on the infill part.

Contributes to issue CURA-4523.

alephobjects/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine